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发明名称
Non-rotatable retaining devices
摘要
申请公布号
US2758891(A)
申请公布日期
1956.08.14
申请号
US19520307276
申请日期
1952.08.30
申请人
KAMMERER ARCHER W
发明人
KAMMERER ARCHER W.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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